Alarm clock



Jan. 21, 1930. E. CARLSON 1,744,524

ALARM CLOCK Fil ed May 31, 1929 Patented Jan. 21, 1930 ran @FFEQE ELOF L. CARLSON, F BRISTOL, CONNECTICUT, T0 THE E, INGB-AHAM 00.,

OF BRISTOL, CONNECTICUT, A GORPORATIGN ALARM CLOCK Application filed May 31,

This invention relates to improvement ialarm clocks and particularly to the means employed for manually shutting oil the alarm after the same has been automatically 3 sounded.

tain details of construction and combinations of parts as will be hereinafter described and particularly recited in the claims.

In the accompanying drawings:

Fig. 1 is a face view of an alarm clock embodying my invention;

Fig. 2 is a broken view partly in front elevation and partly in vertical section;

Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 2;

Fig. 4 is a similar view but showing the pendant-head unscrewed and inclined to align the grooved lower end of the shut-oft plunger with the large end of the key-hole slot in the shut-elf slide;

Fig. 5 is a detached perspective view of the shut-oil slide; and

Fig. 6 is a corresponding view of the shutoff plunger.

In carrying out my invention as herein shown, I employ a reciprocating shut-off plunger 10 mounted for vertical movement in an axial guide-passage 11 in a pendanthead 12 having a depending externallythreaded tubular stem 13 extending through the periphery of'the clock-case l l ano into an internally-threaded bushing 15 riveted into the periphery of the case-back 16. An inverted cup-shaped sheet-metal washer 17 is interposed between the inner face of the pendant-head 12 and the periphery of the clockcase 1 1.

The pendant-head 12 before referred to is provided with the usual pivotal pendant how 18 and by means of its externallythreaded stem 13 serves to couple the clock- 1929. Serial No. 867,187.

case 14 and case-back 16 together against axial separation.

The shut-off plunger 10 is provided at its upper end with a ball-like finger-button 19 and near its pointed inner end 20 is provided with an annular groove 21 adapted to be hooked into engagement with the opposite walls of the contracted portion 22 of a keyhole slot 23. The said key-hole slot 23 terminates at its rear end in the usual enlarged circular portion 24 and is formed in the horizontallyextending a "m 25 of a reciprocating sheet-metal shut-oil slide 26.

The shut-off slide just above referred to is formed with an inwardly-offsetting bowed shut-on finger 27 adapted to engage the teeth of a verge-wheel 28 forming a usual feature of an alarm-train which requires no detailed description herein, other than to that it includes the usual verge 29 having secured to it a hammer-arm 30 carrying at its outer end a hammer 31 adapted to oscillate back and forth to strike a bell 32 through a clearance-opening 33 formed in the periphery of the case-back 16.

The shut-off slide 26 is mounted for vertical movement against the rear face of the front movement-plate 34 by means of a stud 35 which is riveted into the said front movement-plate 34 and mounts a spring-washer 36 which yieldingly holds the said slide 26 against the rear face of the movement-plate 34. The stud 35 extends through a slot 37 in the shut-off slide 28 which latter is also formed with a clearanceslot 38 through which the alarm-set stem 39 passes and with a forwardly-bent guide-finger 4O reciprocating in a slot 41 formed in the movement-plate 34 aforesaid.

From the foregoing it will be seen that the shut-ottslide 26 may be lowered or raised by the shut-oil plunger 10 to move the shut off finger 27 into and out of engagement with the teeth of the verge-wheel 28 so as to respectively stop and release the alarm-train.

If for any reason it should be desired to axially separate the clock-case 14 and casebacl: 16 the pendant-head 12 will be rotated so as to unscrew its stem 13 from the bushing 15 and permit the said head together with the shut-off plunger, to be rocked into the position shown in Fig. t so as to align its grooved lower end with the enlarged portion 2st of the key-hole slot 23 and permit the removal as a unit of the said head pendant-bow l8 and shut-oft plunger 10.

When it is desired to reinstall the unit comprising the pendant-head pendant-bow and shut-oft plunger in the clock, the process described in the preceding paragraph for its removal, will be reversed the pointed end 20 facilitating at this time, the re-hooking of the plunger into the key-hole slot 23.

VNhile I have shown and described the preferred embodiment of my invention as employing a grooved plunger and a shut-oti slide pro ided with with a hey-hole slot, it is obvious without detailed description that other means of connecting the plunger and slide or their equivalents may be employed, so long as the means is of such hooked char acter as to bedisengageable when the guidefixture and plunger are tilted after unfastening the said guide-fixture.

I claim:

1. In an alarm clock. the combination with a manually-operable alarm shut-off plunger formed with an annular coupling-groove; ot a guide-fixture therefor removably fastened to the clock-structure so as to be tiltable with respect thereto when untastened; and an alarnrshutpil member positioned within the clock-case and formed with a key-hole slot having its enlarged portion located out of .=line with the normal path of movement of the said plunger and adapted to receive the grooved portion of the same; whereby when the said guide-fixture is untastened the same may be tilted to align the grooved inner end of the shut-off plunger with the enlarged portion of the said key-hole slot to disconnect the said plunger from the shut-off memher.

2. An alarm clock as defined in claim 1 :and having the guide-fixture threaded into an opening in the-clock-structure which is larger in diameter than the diameter of the said plunger to permit the tilting of the said guide and plunger as a unit to disengage the latter from the alarm-shut-off member within the clock-case.

3. In an alarm clock, the combination with a manually-operable alarm-shut-oli plunger formed with an annular coupling-groove; 20f a guide-fixture for the said plunger removably fastened to the clock-structure so as to be tiltable with respect thereto when unfastened; a vertically-reciprocatable alarmshut-oit member having a horizontal arm formed with a key-hole slot having its enlarged portion located out of line with the normal path of movement of the said plunger and adapted to receive the grooved portion of the same; whereby when the said guidefixture is untastened the same may be tilted to align the grooved inner end of the shut-01f plunger with the enlarged portion of the said key-hole slot to disconnect the said plunger from the said horizontal arm of the shut-0E member.

at. In an alarm clock, the combination with a cloclrcase and a case-back; ot-a guiclefixture passing through the periphery of the said clock-case and threaded into the periphcry of the said case-back; a manually-operable alarm-shut-oft plunger mounted in the said guide-fixture and formed with an annular coupling-groove; and an alarm-shutofi member positioned within the clock-case and formed with a key-hole slot having its enlarged portion located out of line with the normal path of movement of the said plunger and adapted to receive the grooved portion of the same; whereby when the said guidefixture is unscrewed the same may be tilted to align the grooved inner end of the shut-oft plunger with the enlarged portion of the said key-hole slot to disconnect the said plunger from the shut-ofi" member.

5. In an alarm clock. the combination with a clock-case and a case-back; an internallythreaded bushing secured in the periphery of the said case-back; a guide-fixture having a tubular externally-threaded stem extending through the periphery of the clock-case and threaded into the said bushing; a manuallyoperable alarm-shutoff plunger formed with an annular coupling-groove and axially re ciprocatable in the said guide-fixture and its stem; an alarm-shut-ofi member positioned within the clock-case and formed with a keyhole slot having its enlarged portion located out or" line with the normal path of movement of the said plunger and adapted to r ceive the grooved portion of the same; whereby when the said guide-fixture is unscrewed the samemay be tilted to align the grooved inner end of the shut-off plunger with the enlarged portion of the said key-hole slot to disconnect the said plunger from the shutolf member.

6. In an alarm clock. the combination with a manually-operable alarm-sh'ut-otf plunger; of a clock-housing formed with an opening larger in diameter than the diameter of the said plunger and through which the said plunger passes; a plunger-guide removably mounted in the clock-housing in line with the said opening therein; an alarmshu't-ofi member located within the said housing; and hooked connection between the said plunger and alarm-shut-oti member constructed and arranged to be released when the said plunger is tilted out of its normal position by' the disconnection of the said guide-fixture from the said housing. I

In testimony whereof, I have signed this sgecitication.

ELOF L. CARLSON. 

